After adding this PPA, I was able to upgrade to Octave 4.0. The only warning I'll give about 4.0 is that they have switched to a package system for area specific code, such as image processing. Installing the image processing package was painless though.
Another option to avoid this bug is to use the PPA provided by some of the octave developers:
https:/ /launchpad. net/~octave/ +archive/ ubuntu/ stable
After adding this PPA, I was able to upgrade to Octave 4.0. The only warning I'll give about 4.0 is that they have switched to a package system for area specific code, such as image processing. Installing the image processing package was painless though.